Where Morphic began, as a prototype-based implementation. Here are html Morphic User Interface papers, as part of the Self, prototype-based, object oriented programming language.
Morphic's home now, as a class-based implementation, in a new, open source, graphics model for Smalltalk, based on the Morphic interface to Self. Much simpler and yet more general than the model used in many other object oriented languages: MVC.